I just built up my dream bike with R7000, rim brake. I think it’s neat that 105 is now electric, but I’ll stick with mechanical for as long as possible because like someone else mentioned, I don’t want to have to charge another thing - to say nothing of the cost. I also don’t have a head unit to link with Di2 for all the fancy readouts. Also, I still like getting my hands dirty and working on bike parts. Let me cable!